a = 20
b = 6
print('除法运算', a/b)
print('整除运算',a//b)
print('幂运算',2**3)
print('取余运算',11%10 )
print('负数计算 向下取整',10//-3)

# 运算符
# a*=2 相当于 a = a*2
num = 0
num += 2
num1 = 2
num1 *= num1
print(num,type(num))
print(num1)
# 解包赋值
e, f = 10, 20
print(e, f)
# 交换赋值
e, f = f, e
print(e, f)